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Thermoacoustic refrigerator

A technology of thermoacoustic refrigerator and cold head, which is applied in refrigerators, refrigeration and liquefaction, lighting and heating equipment, etc., and can solve problems such as difficulty in using low-temperature refrigerators and limited refrigeration effect of regenerator 12, and achieve reduction Effect of mixing loss and high cooling effect

Active Publication Date: 2019-04-02
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Because the cooling effect of the regenerator 12 is limited, although this refrigerator has only one moving part, its refrigeration temperature is only lower than 200K, so it is difficult to use as a low-temperature refrigerator

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment provides a thermoacoustic refrigerator, such as figure 2 As shown, it includes a compressor 3 and a cold head 1. The cold head 1 is composed of a radiator 11, a regenerator 12, a cold heat exchanger 13, an inertia tube 14 and an air reservoir 15. The compressor 3 adopts a stepped piston structure to form a compression The cavity 331 and the expansion cavity 332 are connected, the compression cavity 331 is connected to the radiator 11, and the expansion cavity 332 is connected to the air reservoir 15.

[0029] Among them, the piston of the compressor 3 is divided into steps, consisting of a first-stage piston 311 and a second-stage piston 312, and the cylinder of the compressor 3 is also divided into a stepped type, consisting of a first-stage cylinder 321 and a second-stage cylinder 322, thus A compression cavity 331 and an expansion cavity 332 are formed.

[0030] One end of the second-stage piston 312 and the second-stage cylinder 322 is at room temperatur...

Embodiment 2

[0038] In order to obtain a lower temperature, the refrigerator is made into a two-stage refrigerator in this embodiment.

[0039] In this embodiment, the thermoacoustic refrigerator is such as image 3 As shown, it includes a compressor and a cold head. Among them, the compressor is made into three stages, that is, the piston is divided into steps, consisting of a first-stage piston 311, a second-stage piston 312, and a third-stage piston 313. The cylinder of the compressor is also Divided into three stages, it is composed of a first-stage cylinder 321, a second-stage cylinder 322 and a third-stage cylinder 323, so that a compression chamber 331 is formed between the first-stage piston 311 and the first-stage cylinder 321, and the second-stage piston 312 A first expansion chamber 332 is formed between the second-stage cylinder 322 and a second expansion chamber 333 is formed between the third-stage piston 313 and the third-stage cylinder 323.

[0040] The cold head consists of a r...

Embodiment 3

[0045] In order to obtain a lower temperature, the refrigerator is made into a two-stage refrigerator in this embodiment.

[0046] In this embodiment, the thermoacoustic refrigerator is such as Figure 4 As shown, it includes a compressor and a cold head. Among them, the compressor is made into three stages, that is, the piston is divided into steps, consisting of a first-stage piston 311, a second-stage piston 312, and a third-stage piston 313. The cylinder of the compressor is also Divided into three stages, it is composed of a first-stage cylinder 321, a second-stage cylinder 322 and a third-stage cylinder 323, so that a compression chamber 331 is formed between the first-stage piston 311 and the first-stage cylinder 321, and the second-stage piston 312 A first expansion chamber 332 is formed between the second-stage cylinder 322 and a second expansion chamber 333 is formed between the third-stage piston 313 and the third-stage cylinder 323.

[0047] The cold head consists of a ...

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Abstract

The invention relates to a thermoacoustic refrigerator, comprising a compressor and a cold head. The cold head is composed of a radiator, a regenerator, a cooling capacity heat exchanger, an inertia tube and a gas reservoir. The compressor adopts a stepped piston structure. A compression chamber and an expansion chamber are formed. The compression chamber is connected to the radiator. The expansion chamber is connected to the gas reservoir. Temperature difference is formed between the compression chamber and the expansion chamber. The thermoacoustic refrigerator adopts the stepped piston structure, so that the compressor forms the compression chamber and the expansion chamber. Compared with a pulse tube refrigerator, temperature difference between room temperature and low temperature is borne by a second stage piston and a second stage air cylinder. In an aspect of a large low-temperature cryocooler, mixing loss due to gas in a vessel can be reduced, thereby achieving higher refrigeration effect.

Description

Technical field [0001] The present invention relates to the field of refrigerators, in particular to a thermoacoustic refrigerator. Background technique [0002] The traditional thermoacoustic refrigerator has a structure like figure 1 As shown, it is composed of a compressor 3 and a cold head 1. The compressor 3 is composed of a piston 31 and a cylinder 32 to form a compression chamber 331. The cold head 1 is composed of a radiator 11, a heat regenerator 12, a cold heat exchanger 13, and an inertia The pipe 14 and the gas reservoir 15 are composed. The regenerator 12 adopts a plate stack structure. [0003] The piston 31 is driven by a driving mechanism such as a linear motor to reciprocate to generate pressure waves. The cold heat exchanger 13 outputs cold to the outside, and the radiator 11 dissipates heat to room temperature. The gas oscillates in the inertial tube 14 to form an enthalpy flow from right to left in the regenerator 12 due to the thermoacoustic effect, thereby ...

Claims

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Application Information

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IPC IPC(8): F25B23/00
CPCF25B23/00
Inventor 朱绍伟
Owner TONGJI UNIV
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